#ifndef _HEADER_FILE_
#define _HEADER_FILE_
#define LENGHT(x) sizeof(x)/sizeof*(x)
#define cau2(x) printf("\n%d",uoc(x))
#define cau3(x) printf("\n%d",bai3(x))
#define cau1(x,y) printf("\n%d",bai1(x,y))
#include<stdio.h>
#include<conio.h>
int uoc(int n);
bool snt(int n);
int bai3(int n);
int bai1(int a[], int n);
#endif
